Geology and ore deposits of the west slope of the Mosquito Range

Behre, Charles H.

doi:10.3133/pp235

Cited by 21 publications

(47 citation statements)

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“…The ages of other deposits, such as at Holy Cross City, can be inferred, correctly or not, from the age of spatially associated intrusive rocks. The age of Sherman-type carbonate-hosted ore deposits in the Leadville and other districts (Behre, 1953) is still under contention for lack of unequivocal crosscutting relationships with dateable intrusive rocks. Landis and Beaty and others, 1990b).…”

Section: Mineral Depositsmentioning

confidence: 99%

Isotopic geochronology of the Leadville 1° x 2° quadrangle, west-central Colorado; summary and discussion

Wallace¹

1995

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Section: Mineral Depositsmentioning

confidence: 99%

Isotopic geochronology of the Leadville 1° x 2° quadrangle, west-central Colorado; summary and discussion

Wallace¹

1995

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“…Although Behre (1953) noted the similarity between the deposit at the Sherman mine, just to the east of the Forest, and Mississippi Valley-type deposits , it was not until the 1980's that workers began research to investigate a possible origin for ores that was different than replacement-type deposits (Beaty and others, 1990). The possible genesis of these deposits is being closely examined as this report is being written, so the ratings and interpretations included herein may need to be modified in the future.…”

Section: Deposit Descriptionmentioning

confidence: 99%

Mineral resource potential and geology of the White River National Forest and the Dillon Ranger District of the Arapaho National Forest, Colorado, with a section on salable commodities

Toth¹,

Wilson²,

Cookro³

et al. 1993

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This summary highlights the mineral resources of the Forest and is presented to aid land-use planners and other non-scientific personnel.This study was undertaken at the request of the U.S. Forest Service. The USGS assessment involved a team of six scientists with expertise in geology, geochemistry, geophysics, mineral deposits, and resource analysis. The Forest includes part of the Colorado Mineral Belt, one of the most productive areas of base and precious metals in North America.Mining and mineral exploration have played a central role in the history of the Forest since the early 1800's; several world-class mines are either in or adjacent to the Forest, and smaller mines are abundant throughout the Forest.More than $15 billion in metals (at current-day prices) has been produced in mining areas adjacent to or within the Forest.The last producing mine (Oilman mine) ceased its operations in 1981; current mineral-related activity consists of annual assessment work on unpatented mining claims, prospecting, and small-scale mining. Large tracts within the Forest, including Wilderness Areas, have abundant direct and indirect indications of the presence of metallic mineral deposits.Fourteen metallic mineral-deposit types were identified in the Forest; of these, stockwork molybdenum, polymetallic vein, polymetallic replacement, and placer gold deposits are the most likely to have undiscovered resources.The commodities most likely to occur are molybdenum, zinc, lead, silver, gold, and copper.Estimates of the number of undiscovered deposits were made at three probability levels (90,50, and 10 percent); estimated tonnages were determined by statistical iteration with tonnages and grades of known deposits worldwide.Favorable tracts are shown in figure 1 of this report. Probabilistic estimates, which do not take into account the cost of recovery, indicate a mean value of $4.05 billion for undiscovered metallic mineral resources in the Forest (shown below).

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“…The Leadville Dolostone has been mapped in central Colorado in the Mosquito and Sawatch Ranges (Behre, 1953;Tweto and Levering, 1977;Levering and others, 1978;Tweto and others, 1978). In the northern and western parts of the San Juan Basin and in the adjacent San Juan Mountains, the Leadville Limestone unconformably overlies the Ouray Limestone (Devonian) or Elbert Formation (Devonian).…”

Section: Leadville Limestonementioning

confidence: 99%

“…1) was measured above the mine portal at the head of the Iowa Amphitheater at the east end of Iowa Gulch. The geologic map of Behre (1953) shows, and its text describes, the complex suite of intrusion and structural geology associated with the Mississippian section. There are sills of porphyry in the Cambrian quartzite and a thick sill of porphyry above the Leadville Dolostone.…”

Section: Sherman Mine Sectionmentioning

confidence: 99%

“…The carbonate section is strongly altered and recrystallized. At West Dyer Mountain, 5 miles (8 km) east of Leadville, the Leadville Dolostone is 154 ft (47 m) thick and at Mount Sherman, 6.5 miles (10.5 km) southeast of the town of Leadville, 124 ft (38 m) thick (Behre, 1953). Dorward (1985) indicated a thickness of about 125 ft (38 m) for his Leadville Limestone at the Sherman Mine.…”

Section: Sherman Mine Sectionmentioning

confidence: 99%

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Stratigraphy of the Mississippian System, south-central Colorado and north-central New Mexico

Armstrong¹,

Mamet²,

Repetski³

1992

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Geology and ore deposits of the west slope of the Mosquito Range

Cited by 21 publications

References 0 publications

Isotopic geochronology of the Leadville 1° x 2° quadrangle, west-central Colorado; summary and discussion

Isotopic geochronology of the Leadville 1° x 2° quadrangle, west-central Colorado; summary and discussion

Mineral resource potential and geology of the White River National Forest and the Dillon Ranger District of the Arapaho National Forest, Colorado, with a section on salable commodities

Stratigraphy of the Mississippian System, south-central Colorado and north-central New Mexico

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